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37796aa7bf
lvm2/scripts/blkdeactivate.sh.in
Zhang Huan 37796aa7bf blkdeactive: Introduce option "forcevg" to forcibly deactivate VG 
This patch introduces new option "forcevg" for LVM, the main purpose is
to flush in-flight I/O operations and replace the LV's device mapper
table with 'error' target, this is accomplished by using command
"dmsetup wipe_table".

To handle the failure as soon as possible, it will not deactivate
holders and not try to use command "lvchange", thus can speed up
wiping table.

This option is supposed to be used by "lvmlockctl" command to forcibly
deactivate volume group, this can avoid watchdog reset when detect
drive failures.

Signed-off-by: Zhang Huan <zhanghuan@huayun.com>
[Refactored changes and commit log]
Signed-off-by: Leo Yan <leo.yan@linaro.org>
2021-03-02 11:32:54 -06:00

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#!/bin/bash
#
# Copyright (C) 2012-2020 Red Hat, Inc. All rights reserved.
#
# This file is part of LVM2.
#
# This copyrighted material is made available to anyone wishing to use,
# modify, copy, or redistribute it subject to the terms and conditions
# of the GNU General Public License v.2.
#
# You should have received a copy of the GNU General Public License
# along with this program; if not, write to the Free Software Foundation,
# Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
#
# Author: Peter Rajnoha <prajnoha at redhat.com>
#
# Script for deactivating block devices
#
# Requires:
# bash >= 4.0 (associative array support)
# util-linux {
# lsblk >= 2.22 (lsblk -s support)
# umount
# }
# dmsetup >= 1.02.68 (--retry option support)
# lvm >= 2.2.89 (activation/retry_deactivation config support)
#
#set -x
shopt -s dotglob nullglob
TOOL=blkdeactivate
DEV_DIR="/dev"
SYS_BLK_DIR="/sys/block"
MDADM="/sbin/mdadm"
MOUNTPOINT="/bin/mountpoint"
MPATHD="/sbin/multipathd"
UMOUNT="/bin/umount"
VDO="/bin/vdo"
sbindir="@SBINDIR@"
DMSETUP="$sbindir/dmsetup"
LVM="$sbindir/lvm"
if "$UMOUNT" --help | grep -- "--all-targets" >"$DEV_DIR/null"; then
UMOUNT_OPTS="--all-targets "
else
UMOUNT_OPTS=""
FINDMNT="/bin/findmnt -r --noheadings -u -o TARGET"
FINDMNT_READ="read -r mnt"
fi
DMSETUP_OPTS=""
LVM_OPTS=""
MDADM_OPTS=""
MPATHD_OPTS=""
VDO_OPTS=""
LSBLK="/bin/lsblk -r --noheadings -o TYPE,KNAME,NAME,MOUNTPOINT"
LSBLK_VARS="local devtype local kname local name local mnt"
LSBLK_READ="read -r devtype kname name mnt"
SORT_MNT="/bin/sort -r -u -k 4"
# Do not show tool errors by default (only done/skipping summary
# message provided by this script) and no verbose mode by default.
ERRORS=0
VERBOSE=0
# Do not unmount mounted devices by default.
DO_UMOUNT=0
# Deactivate each LV separately by default (not the whole VG).
LVM_DO_WHOLE_VG=0
# Forcily deactivate the whole VG by wiping DM table
LVM_DO_FORCE_VG=0
# Do not retry LV deactivation by default.
LVM_CONFIG="activation{retry_deactivation=0}"
# Do not wait for MD RAID device resync, recovery or reshape.
MDRAID_DO_WAIT=0
# Do not disable queueing if set on multipath devices.
MPATHD_DO_DISABLEQUEUEING=0
#
# List of device names and/or VGs to be skipped.
# Device name is the KNAME from lsblk output.
#
# If deactivation of any device fails, it's automatically
# added to the SKIP_DEVICE_LIST (also a particular VG
# added to the SKIP_VG_LIST for a device that is an LV).
#
# These lists provide device tree pruning to skip
# particular device/VG deactivation that failed already.
# (lists are associative arrays!)
#
declare -A SKIP_DEVICE_LIST=()
declare -A SKIP_VG_LIST=()
#
# List of mountpoints to be skipped. Any device that is mounted on the mountpoint
# listed here will be added to SKIP_DEVICE_LIST (and SKIP_VG_LIST) automatically.
# (list is an associative array!)
#
declare -A SKIP_UMOUNT_LIST=(["/"]=1 \
["/lib"]=1 ["/lib64"]=1 \
["/bin"]=1 ["/sbin"]=1 \
["/var"]=1 ["/var/log"]=1 \
["/usr"]=1 \
["/usr/lib"]=1 ["/usr/lib64"]=1 \
["/usr/sbin"]=1 ["/usr/bin"]=1)
# Bash can't properly handle '[' and ']' used as a subscript
# within the '()'initialization - it needs to be done separately!
SKIP_UMOUNT_LIST["[SWAP]"]=1
usage() {
echo "${TOOL}: Utility to deactivate block devices"
echo
echo " ${TOOL} [options] [device...]"
echo " - Deactivate block device tree."
echo " If devices are specified, deactivate only supplied devices and their holders."
echo
echo " Options:"
echo " -e | --errors Show errors reported from tools"
echo " -h | --help Show this help message"
echo " -d | --dmoptions DM_OPTIONS Comma separated DM specific options"
echo " -l | --lvmoptions LVM_OPTIONS Comma separated LVM specific options"
echo " -m | --mpathoptions MPATH_OPTIONS Comma separated DM-multipath specific options"
echo " -r | --mdraidoptions MDRAID_OPTIONS Comma separated MD RAID specific options"
echo " -o | --vdooptions VDO_OPTIONS Comma separated VDO specific options"
echo " -u | --umount Unmount the device if mounted"
echo " -v | --verbose Verbose mode (also implies -e)"
echo
echo " Device specific options:"
echo " DM_OPTIONS:"
echo " retry retry removal several times in case of failure"
echo " force force device removal"
echo " LVM_OPTIONS:"
echo " retry retry removal several times in case of failure"
echo " wholevg deactivate the whole VG when processing an LV"
echo " forcevg force deactivate (wipe_table) the whole VG"
echo " MDRAID_OPTIONS:"
echo " wait wait for resync, recovery or reshape to complete first"
echo " MPATH_OPTIONS:"
echo " disablequeueing disable queueing on all DM-multipath devices first"
echo " VDO_OPTIONS:"
echo " configfile=file use specified VDO configuration file"
exit
}
add_device_to_skip_list() {
SKIP_DEVICE_LIST+=(["$kname"]=1)
return 1
}
add_vg_to_skip_list() {
SKIP_VG_LIST+=(["$DM_VG_NAME"]=1)
return 1
}
is_top_level_device() {
# top level devices do not have any holders, that is
# the SYS_BLK_DIR/<device_name>/holders dir is empty
files=$(echo "$SYS_BLK_DIR/$kname/holders/"*)
test -z "$files"
}
device_umount_one() {
test -z "$mnt" && return 0
if test -z "${SKIP_UMOUNT_LIST["$mnt"]}" -a "$DO_UMOUNT" -eq "1"; then
echo -n " [UMOUNT]: unmounting $name ($kname) mounted on $mnt... "
if eval "$UMOUNT" $UMOUNT_OPTS "$(printf "%s" "$mnt")" "$OUT" "$ERR"; then
echo "done"
elif "$MOUNTPOINT" -q "$mnt"; then
echo "skipping"
add_device_to_skip_list
else
echo "already unmounted"
fi
else
echo " [SKIP]: unmount of $name ($kname) mounted on $mnt"
add_device_to_skip_list
fi
}
device_umount() {
test "$devtype" != "lvm" && test "${kname:0:3}" != "dm-" \
&& test "${kname:0:2}" != "md" && return 0
# FINDMNT is defined only if umount --all-targets is not available.
# In that case, read the list of multiple mount points of one device
# using FINDMNT and unmount it one by one manually.
if test -z "$FINDMNT"; then
device_umount_one
else
while $FINDMNT_READ; do
device_umount_one || return 1
done <<< "$($FINDMNT "$DEV_DIR/$kname")"
fi
}
deactivate_holders () {
local skip=1; $LSBLK_VARS
# Get holders for the device - either a mount or another device.
# First line on the lsblk output is the device itself - skip it for
# the deactivate call as this device is already being deactivated.
while $LSBLK_READ; do
test -e "$SYS_BLK_DIR/$kname" || continue
# check if the device not on the skip list already
test -z "${SKIP_DEVICE_LIST["$kname"]}" || return 1
# try to deactivate the holder
test "$skip" -eq 1 && skip=0 && continue
deactivate || return 1
done <<< "$($LSBLK "$1")"
}
deactivate_dm () {
local xname
xname=$(printf "%s" "$name")
test -b "$DEV_DIR/mapper/$xname" || return 0
test -z "${SKIP_DEVICE_LIST["$kname"]}" || return 1
deactivate_holders "$DEV_DIR/mapper/$xname" || return 1
echo -n " [DM]: deactivating $devtype device $xname ($kname)... "
if eval "$DMSETUP" $DMSETUP_OPTS remove "$xname" "$OUT" "$ERR"; then
echo "done"
else
echo "skipping"
add_device_to_skip_list
fi
}
deactivate_lvm () {
local DM_VG_NAME; local DM_LV_NAME
eval "$(eval "$DMSETUP" splitname --nameprefixes --noheadings --rows "$name" LVM "$ERR")"
test -b "$DEV_DIR/$DM_VG_NAME/$DM_LV_NAME" || return 0
test -z "${SKIP_VG_LIST["$DM_VG_NAME"]}" || return 1
if test "$LVM_DO_WHOLE_VG" -eq 0; then
# Skip LVM device deactivation if LVM tools missing.
test "$LVM_AVAILABLE" -eq 0 && {
add_device_to_skip_list
return 1
}
# Deactivating only the LV specified
deactivate_holders "$DEV_DIR/$DM_VG_NAME/$DM_LV_NAME" || {
add_device_to_skip_list
return 1
}
echo -n " [LVM]: deactivating Logical Volume $DM_VG_NAME/$DM_LV_NAME... "
if eval "$LVM" lvchange $LVM_OPTS --config \'log\{prefix=\"\"\} $LVM_CONFIG\' -aln "$DM_VG_NAME/$DM_LV_NAME" "$OUT" "$ERR"; then
echo "done"
else
echo "skipping"
add_device_to_skip_list
fi
else
# Skip LVM VG deactivation if LVM tools missing.
test "$LVM_AVAILABLE" -eq 0 && {
add_vg_to_skip_list
return 1
}
# Deactivating the whole VG the LV is part of
lv_list=$(eval "$LVM" vgs --config "$LVM_CONFIG" --noheadings --rows -o lv_name "$DM_VG_NAME" "$ERR")
for lv in $lv_list; do
test -b "$DEV_DIR/$DM_VG_NAME/$lv" || continue
deactivate_holders "$DEV_DIR/$DM_VG_NAME/$lv" || {
add_vg_to_skip_list
return 1
}
done
echo -n " [LVM]: deactivating Volume Group $DM_VG_NAME... "
if eval "$LVM" vgchange $LVM_OPTS --config \'log\{prefix=\" \"\} $LVM_CONFIG\' -aln "$DM_VG_NAME" "$OUT" "$ERR"; then
echo "done"
else
echo "skipping"
add_vg_to_skip_list
fi
fi
}
is_top_level_lv() {
is_top_level_device && return 0
skip=1
while $LSBLK_READ; do
# First line self device
test "$skip" -eq 1 && skip=0 && continue
# not top device but top lv in this VG, return 0
test "$devtype" != "lvm" && return 0
test ${name:0:${#DM_VG_NAME}+1} != $DM_VG_NAME"-" && return 0
test ${name:0:${#DM_VG_NAME}+2} = $DM_VG_NAME"--" && return 0
# the same vg, hidden lv
test ${name:0:${#DM_VG_NAME}+1} = $DM_VG_NAME"-" && return 1
done <<< "$($LSBLK $DEV_DIR/$kname)"
}
deactivate_vg () {
local VG_NAME; local LV_NAME;
local DM_VG_NAME; local DM_LV_NAME;
local LVS;
local skip_disablequeue=0
VG_NAME=$name
DM_VG_NAME=${name/-/--}
test -z "${SKIP_VG_LIST["$DM_VG_NAME"]}" || return 1
test "$LVM_AVAILABLE" -eq 0 && {
add_device_to_skip_list
return 1
}
# Replace DM table with 'error' target.
# The reason for not using command "lvchange" ahead if because it may hang
# for a long time for the failed device.
echo -n " [LVM]: force deactivating Logical Volumes for $VG_NAME... "
"$DMSETUP" info -c -S "uuid=~LVM && vgname=$VG_NAME && lv_layer=\"\"" \
-o name --noheadings | xargs "$DMSETUP" wipe_table
if [ "$?" = "0" ]; then
echo "wipe table done"
else
echo "wipe table failed" && return 1
fi
}
deactivate_md () {
local xname
xname=$(printf "%s" "$name")
local sync_action
test -b "$DEV_DIR/$xname" || return 0
test -z "${SKIP_DEVICE_LIST["$kname"]}" || return 1
# Skip MD device deactivation if MD tools missing.
test "$MDADM_AVAILABLE" -eq 0 && {
add_device_to_skip_list
return 1
}
deactivate_holders "$DEV_DIR/$xname" || return 1
echo -n " [MD]: deactivating $devtype device $kname... "
test "$MDRAID_DO_WAIT" -eq 1 && {
sync_action=$(cat "$SYS_BLK_DIR/$kname/md/sync_action")
test "$sync_action" != "idle" && {
echo -n "$sync_action action in progress... "
if eval "$MDADM" $MDADM_OPTS -W "$DEV_DIR/$kname" "$OUT" "$ERR"; then
echo -n "complete... "
else
test $? -ne 1 && echo -n "failed to wait for $sync_action action... "
fi
}
}
if eval "$MDADM" $MDADM_OPTS -S "$xname" "$OUT" "$ERR"; then
echo "done"
else
echo "skipping"
add_device_to_skip_list
fi
}
deactivate_vdo() {
local xname
xname=$(printf "%s" "$name")
test -b "$DEV_DIR/mapper/$xname" || return 0
test -z "${SKIP_DEVICE_LIST["$kname"]}" || return 1
# Skip VDO device deactivation if VDO tools missing.
test "$VDO_AVAILABLE" -eq 0 && {
add_device_to_skip_list
return 1
}
deactivate_holders "$DEV_DIR/mapper/$xname" || return 1
echo -n " [VDO]: deactivating VDO volume $xname... "
if eval "$VDO" stop $VDO_OPTS --name="$xname" "$OUT" "$ERR"; then
echo "done"
else
echo "skipping"
add_device_to_skip_list
fi
}
deactivate () {
######################################################################
# DEACTIVATION HOOKS FOR NEW DEVICE TYPES GO HERE! #
# #
# Identify a new device type either by inspecting the TYPE provided #
# by lsblk directly ($devtype) or by any other mean that is suitable #
# e.g. the KNAME provided by lsblk ($kname). See $LSBLK_VARS for #
# complete list of variables that may be used. Then call a #
# device-specific deactivation function that handles the exact type. #
# #
# This device-specific function will certainly need to call #
# deactivate_holders first to recursively deactivate any existing #
# holders it might have before deactivating the device it processes. #
######################################################################
if test "$devtype" = "vg"; then
deactivate_vg
elif test "$devtype" = "lvm"; then
deactivate_lvm
elif test "$devtype" = "vdo"; then
deactivate_vdo
elif test "${kname:0:3}" = "dm-"; then
deactivate_dm
elif test "${kname:0:2}" = "md"; then
deactivate_md
fi
}
deactivate_all() {
$LSBLK_VARS
skip=0
echo "Deactivating block devices:"
test "$MPATHD_RUNNING" -eq 1 && {
echo -n " [DM]: disabling queueing on all multipath devices... "
eval "$MPATHD" $MPATHD_OPTS disablequeueing maps "$ERR" | grep '^ok$' >"$DEV_DIR/null" && echo "done" || echo "failed"
}
if test $# -eq 0; then
#######################
# Process all devices #
#######################
# Unmount all relevant mountpoints first
while $LSBLK_READ; do
device_umount
done <<< "$($LSBLK | $SORT_MNT)"
# Do deactivate
while $LSBLK_READ; do
# 'disk' is at the bottom already and it's a real device
test "$devtype" = "disk" && continue
# if deactivation of any device fails, skip processing
# any subsequent devices within its subtree as the
# top-level device could not be deactivated anyway
test "$skip" -eq 1 && {
# reset 'skip' on top level device
if is_top_level_device ; then
skip=0
else
continue
fi
}
# check if the device is not on the skip list already
test -z "${SKIP_DEVICE_LIST["$kname"]}" || continue
# try to deactivate top-level device, set 'skip=1'
# if it fails to do so - this will cause all the
# device's subtree to be skipped when processing
# devices further in this loop
deactivate || skip=1
done <<< "$($LSBLK -s)"
else
##################################
# Process only specified devices #
##################################
while test $# -ne 0; do
# Force deactivate the whole vg
if test $LVM_DO_FORCE_VG -ne 0; then
$LSBLK_READ <<< "vg $1 $1"
deactivate || return 1
elif -b "$1"; then
# Single dm device tree deactivation.
# Unmount all relevant mountpoints first
while $LSBLK_READ; do
device_umount
done <<< "$($LSBLK "$1" | $SORT_MNT)"
$LSBLK_READ <<< "$($LSBLK --nodeps "$1")"
# check if the device is not on the skip list already
test -z "${SKIP_DEVICE_LIST["$kname"]}" || {
shift
continue
}
deactivate
else
echo "$1: device not found"
return 1
fi
shift
done;
fi
}
get_dmopts() {
ORIG_IFS=$IFS; IFS=','
for opt in $1; do
case $opt in
"") ;;
"retry") DMSETUP_OPTS+="--retry " ;;
"force") DMSETUP_OPTS+="--force " ;;
*) echo "$opt: unknown DM option"
esac
done
IFS=$ORIG_IFS
}
get_lvmopts() {
ORIG_IFS=$IFS; IFS=','
for opt in $1; do
case "$opt" in
"") ;;
"retry") LVM_CONFIG="activation{retry_deactivation=1}" ;;
"wholevg") LVM_DO_WHOLE_VG=1 ;;
"forcevg") LVM_DO_FORCE_VG=1 ;;
*) echo "$opt: unknown LVM option"
esac
done
IFS=$ORIG_IFS
}
get_mdraidopts() {
ORIG_IFS=$IFS; IFS=','
for opt in $1; do
case "$opt" in
"") ;;
"wait") MDRAID_DO_WAIT=1 ;;
*) echo "$opt: unknown MD RAID option"
esac
done
IFS=$ORIG_IFS
}
get_mpathopts() {
ORIG_IFS=$IFS; IFS=','
for opt in $1; do
case "$opt" in
"") ;;
"disablequeueing") MPATHD_DO_DISABLEQUEUEING=1 ;;
*) echo "$opt: unknown DM-multipath option"
esac
done
IFS=$ORIG_IFS
}
get_vdoopts() {
ORIG_IFS=$IFS; IFS=','
for opt in $1; do
case "$opt" in
"") ;;
configfile=*) tmp=${opt#*=}; VDO_OPTS+="--confFile=${tmp%%,*} " ;;
*) echo "$opt: unknown VDO option"
esac
done
IFS=$ORIG_IFS
}
set_env() {
if test "$ERRORS" -eq "1"; then
unset ERR
else
ERR="2>$DEV_DIR/null"
fi
if test "$VERBOSE" -eq "1"; then
unset OUT
UMOUNT_OPTS+="-v"
DMSETUP_OPTS+="-vvvv"
LVM_OPTS+="-vvvv"
MDADM_OPTS+="-vv"
MPATHD_OPTS+="-v 3"
VDO_OPTS+="--verbose "
else
OUT="1>$DEV_DIR/null"
fi
if test -f "$LVM"; then
LVM_AVAILABLE=1
else
LVM_AVAILABLE=0
fi
if test -f $MDADM; then
MDADM_AVAILABLE=1
else
MDADM_AVAILABLE=0
fi
if test -f $VDO; then
VDO_AVAILABLE=1
else
VDO_AVAILABLE=0
fi
MPATHD_RUNNING=0
test "$MPATHD_DO_DISABLEQUEUEING" -eq 1 && {
if test -f "$MPATHD"; then
if eval "$MPATHD" show daemon "$ERR" | grep "running" >"$DEV_DIR/null"; then
MPATHD_RUNNING=1
fi
fi
}
}
while test $# -ne 0; do
case "$1" in
"") ;;
"-e"|"--errors") ERRORS=1 ;;
"-h"|"--help") usage ;;
"-d"|"--dmoptions") get_dmopts "$2" ; shift ;;
"-l"|"--lvmoptions") get_lvmopts "$2" ; shift ;;
"-m"|"--mpathoptions") get_mpathopts "$2" ; shift ;;
"-r"|"--mdraidoptions") get_mdraidopts "$2"; shift ;;
"-o"|"--vdooptions") get_vdoopts "$2"; shift ;;
"-u"|"--umount") DO_UMOUNT=1 ;;
"-v"|"--verbose") VERBOSE=1 ; ERRORS=1 ;;
"-vv") VERBOSE=1 ; ERRORS=1 ; set -x ;;
*) break ;;
esac
shift
done
set_env
deactivate_all "$@"
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